| 摘要 |
<p>The fully equipped bridge-crane (5) is essentially consisting of an elevator conveyor (8) fitted at its lower end with reclaiming facilities (9, 10) and with two discharge openings, one at the top end (12) for evacuation of the finished product and the other 913), near the former, for stacking of the product during turning-up of the heaps or stockpiles. The bridge-crane (5) is also supporting a transverse conveyor belt (17) and a distributor (18) both useful for stockpiling of the fresh product. The utilization method of such bridge-crane requires numerous product stockpiles (I, II,....V) interspaced by free areas in which the elevator conveyor can operate. Each free area includes a prefixed, several days old product stockpile; these stock piles are forming a closed cycle so that the last stockpile (V) will be located in front of the first (I). The bridge-crane reclaims a daily finished product quantity from the last stock pile while stacking a daily portion of fresh product on the first stockpile; at the same time a daily portion of product is turned up each stockpile and is then transferred to the next stockpile so that the stockpiles are left to settle for a prefixed time while limited quantities can be turned up fast and with low energy consumption.</p> |
